Chemicals and method for forming cured coat having lubricating and hydrophilic properties
AssigneeNippon Paint Co., Ltd.
InventorKatsuyoshi Yamasoe
Life of this patent
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Abstract
Aluminum or aluminum alloy substrates are coated with primer coating chemicals and topcoating chemicals for forming a cured primer coat having lubricating and hydrophilic properties. The primer coating chemicals contains a thermosetting water-soluble or water-dispersible resin component (A), and the topcoating chemicals contains a resin component (C) containing a carboxymethylcellulose derivative and N-methylolacrylamide. At least one of them further contains a lubricant (B) selected from the group consisting of a higher aliphatic acid lubricant and an inorganic lubricant.
Claims7
An aqueous primer coating composition for forming a cured primer coat having lubricating and hydrophilic properties consisting essentially of a primer coating chemical, water, and a compound (D) selected from the group consisting of ammonia water, amine compounds, organic acids and inorganic acids, said primer coating chemical consisting essentially of at least one thermosetting water-soluble or thermosetting water-dispersible resin component (A) selected from the group consisting of acrylic copolymer resins, urethane resins, alkyd resins, epoxy resins and thermosetting polyamide resins, and a lubricant (B) selected from the group consisting of a higher aliphatic acid lubricant, an inorganic lubricant and a higher aliphatic acid lubricant and an inorganic lubricant, a weight ratio of said resin component (A) to said lubricant (B) on a solid basis being:
- (a) where said lubricant is the higher aliphatic acid lubricant, 95/5 to 70/30,
- (b) where said lubricant is the inorganic lubricant, 95/5 to 20/80, and
- (c) where said lubricant is the higher aliphatic acid lubricant and the inorganic lubricant, 95/5 to 20/80, a weight ratio of said resin component (A) to said higher aliphatic acid lubricant being 95/5 to 70/30.
An aqueous topcoating composition comprising a topcoating chemical and water for forming a lubricating and hydrophilic topcoat, said topcoating chemical consisting essentially of a resin component (C) containing a carboxymethylcellulose derivative and N-methylolacrylamide, and a lubricant (B) selected from the group consisting of a higher aliphatic acid lubricant, an inorganic lubricant and a higher aliphatic acid lubricant and an inorganic lubricant, a weight ratio of said resin component (C) to said lubricant (B) on a solid basis being:
- (a) where said lubricant is the higher aliphatic acid lubricant 95/5 to 70/30,
- (b) where said lubricant is the inorganic lubricant 95/5 to 20/80
- (c) where said lubricant is the higher aliphatic acid lubricant and the inorganic lubricant, 95/5 to 20/80, a weight ratio of said resin component (C) to said higher aliphatic acid lubricant being 95/5 to 70/30.
Dependencies are inferred from the claim text.